I use 9x19mm +P 100gr. hp Pow'R Ball ammo for some 9mm guns.
I have never had the oportunity to test it myself for penetration and expansion.
I like it because it mimics fmj for reliability issues. The mfr. claims a velocity of 1475fps and 483 ft/lbs. of energy from whatever test barrel is used.
The ammo has changed recently, which makes me a bit suspicious. The old ammo looks exactly like a 9mm ball round except for the white polymer tip on the bullet. It came packed in a 20-rd. red box marked Corbon:
www.corbon.com The newer stuff is a much more squat round, with a blunter bullet shape. The overall length of the cartridge is shorter. So much shorter, in fact, that when I got the new stuff I thought maybe I'd got 9x17/ .380 by mistake. Besides being more squat and blunt shaped, the bullet is seated deeper in the case as evidenced by the crimp of the cartridge case. It now comes packed in a red box with a clear acetate window marked Glaser Safety Slug
www.safetyslug.com and instead of "patent pending" now reads "Patent #6,792,869." I do not know why the changes were made. I *think* Corbon bought Glaser, and then decided to market DPX and other Corbon brands under Corbon and transfer the other technology bullets to the Glaser line. I have not talked to anybody associated with the company, so I really don't know what the story is. But the ammo has changed in design and appearance. Any information on the rationales for the changes would be interesting. I would also welcome independent tests of the bullet performance.